3.5 gallon buckets I watered 3/4 of a gallon a few days ago.
Overall environment like humidity and heat and air movement, plus the plants’ thirst will determine how quickly it goes through water, so my experience may be different than yours, but I suspect you may be overwatering a little bit.
That said, I usually give my 3 gallons a 1/4 gallon of water every three days or so and my 5 gallons get a 1/2 gallon of water every three days or so.
Hopefully some others will chime in with their watering schedule with similar size pots, then you can draw some more accurate comparisons.
Now, after writing all that, I’m thinking back to when you said the leaves droop at night. This may just be a characteristic of the plant, as I’ve had some plants that really do look like they’re sleeping with the heavily drooping leaves while others are not. The difference is, I’ve never had them drooping with the lights on, unless they’re thirsty or overwatered. I think overwatered leaves droop at the top of the plant first, but I could be wrong. I know underwatered leaves droop at the bottom of the plant first.
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